<template>
    <view class="uni-navbar" :class="{'uni-dark':dark, 'uni-nvue-fixed': fixed}">
        <view class="uni-navbar__content"
              :class="{ 'uni-navbar--fixed': fixed, 'uni-navbar--shadow': shadow, 'uni-navbar--border': border }"
              :style="{ 'background-color': themeBgColor, 'border-bottom-color':themeColor }">
            <status-bar v-if="statusBar"/>
            <view :style="{ color: themeColor,backgroundColor: themeBgColor ,height:navbarHeight}"
                  class="uni-navbar__header">
                <view @tap="onClickLeft" class="uni-navbar__header-btns uni-navbar__header-btns-left"
                      :style="{width:leftIconWidth}">
                    <slot name="left">
                        <view class="uni-navbar__content_view" v-if="leftIcon.length > 0">
                            <uni-icons :color="themeColor" :type="leftIcon" size="20"/>
                        </view>
                        <view :class="{ 'uni-navbar-btn-icon-left': !leftIcon.length > 0 }" class="uni-navbar-btn-text"
                              v-if="leftText.length">
                            <text :style="{ color: themeColor, fontSize: '12px' }">{{ leftText }}</text>
                        </view>
                    </slot>
                </view>
                <view class="uni-navbar__header-container " @tap="onClickTitle">
                    <slot>
                        <view class="uni-navbar__header-container-inner" v-if="title.length>0">
                            <text class="uni-nav-bar-text uni-ellipsis-1"
                                  :style="{color: themeColor }">{{ title }}
                            </text>
                        </view>
                    </slot>
                </view>
                <view @click="onClickRight" class="uni-navbar__header-btns uni-navbar__header-btns-right"
                      :style="{width:rightIconWidth}">
                    <slot name="right">
                        <view v-if="rightIcon.length">
                            <uni-icons :color="themeColor" :type="rightIcon" size="22"/>
                        </view>
                        <view class="uni-navbar-btn-text" v-if="rightText.length && !rightIcon.length">
                            <text class="uni-nav-bar-right-text" :style="{ color: themeColor}">{{ rightText }}</text>
                        </view>
                    </slot>
                </view>
            </view>
        </view>
        <!-- #ifndef APP-NVUE -->
        <view class="uni-navbar__placeholder" v-if="fixed">
            <status-bar v-if="statusBar"/>
            <view class="uni-navbar__placeholder-view" :style="{ height:navbarHeight}"/>
        </view>
        <!-- #endif -->
    </view>
</template>

<script>
import statusBar from "./uni-status-bar.vue";

const getVal = (val) => typeof val === 'number' ? val + 'px' : val;

/**
 *
 *
 * NavBar 自定义导航栏
 * @description 导航栏组件，主要用于头部导航
 * @tutorial https://ext.dcloud.net.cn/plugin?id=52
 * @property {Boolean} dark 开启黑暗模式
 * @property {String} title 标题文字
 * @property {String} leftText 左侧按钮文本
 * @property {String} rightText 右侧按钮文本
 * @property {String} leftIcon 左侧按钮图标（图标类型参考 [Icon 图标](http://ext.dcloud.net.cn/plugin?id=28) type 属性）
 * @property {String} rightIcon 右侧按钮图标（图标类型参考 [Icon 图标](http://ext.dcloud.net.cn/plugin?id=28) type 属性）
 * @property {String} color 图标和文字颜色
 * @property {String} backgroundColor 导航栏背景颜色
 * @property {Boolean} fixed = [true|false] 是否固定顶部
 * @property {Boolean} statusBar = [true|false] 是否包含状态栏
 * @property {Boolean} shadow = [true|false] 导航栏下是否有阴影
 * @property {Boolean} stat 是否开启统计标题上报
 * @event {Function} clickLeft 左侧按钮点击时触发
 * @event {Function} clickRight 右侧按钮点击时触发
 * @event {Function} clickTitle 中间标题点击时触发
 */
export default {
    name: "UniNavBar",
    components: {
        statusBar
    },
    emits: ['clickLeft', 'clickRight', 'clickTitle'],
    props: {
        dark: {
            type: Boolean,
            default: false
        },
        title: {
            type: String,
            default: ""
        },
        leftText: {
            type: String,
            default: ""
        },
        rightText: {
            type: String,
            default: ""
        },
        leftIcon: {
            type: String,
            default: ""
        },
        rightIcon: {
            type: String,
            default: ""
        },
        fixed: {
            type: [Boolean, String],
            default: false
        },
        color: {
            type: String,
            default: ""
        },
        backgroundColor: {
            type: String,
            default: ""
        },
        statusBar: {
            type: [Boolean, String],
            default: false
        },
        shadow: {
            type: [Boolean, String],
            default: false
        },
        border: {
            type: [Boolean, String],
            default: true
        },
        height: {
            type: [Number, String],
            default: 44
        },
        leftWidth: {
            type: [Number, String],
            default: 60
        },
        rightWidth: {
            type: [Number, String],
            default: 60
        },
        stat: {
            type: [Boolean, String],
            default: ''
        }
    },
    computed: {
        themeBgColor() {
            if (this.dark) {
                // 默认值
                if (this.backgroundColor) {
                    return this.backgroundColor
                } else {
                    return this.dark ? '#333' : '#FFF'
                }
            }
            return this.backgroundColor || '#FFF'
        },
        themeColor() {
            if (this.dark) {
                // 默认值
                if (this.color) {
                    return this.color
                } else {
                    return this.dark ? '#fff' : '#333'
                }
            }
            return this.color || '#333'
        },
        navbarHeight() {
            return getVal(this.height)
        },
        leftIconWidth() {
            return getVal(this.leftWidth)
        },
        rightIconWidth() {
            return getVal(this.rightWidth)
        }
    },
    mounted() {
        if (uni.report && this.stat && this.title !== '') {
            uni.report('title', this.title)
        }
    },
    methods: {
        onClickLeft() {
            this.$emit("clickLeft");
        },
        onClickRight() {
            this.$emit("clickRight");
        },
        onClickTitle() {
            this.$emit("clickTitle");
        }
    }
};
</script>

<style lang="scss" scoped>
$nav-height: 44px;

.uni-nvue-fixed {
    /* #ifdef APP-NVUE */
    position: sticky;
    /* #endif */
}

.uni-navbar {
    // box-sizing: border-box;
}

.uni-nav-bar-text {
    /* #ifdef APP-PLUS */
    font-size: 34rpx;
    /* #endif */
    /* #ifndef APP-PLUS */
    font-size: 14px;
    /* #endif */
}

.uni-nav-bar-right-text {
    font-size: 12px;
}

.uni-navbar__content {
    position: relative;
    // background-color: #fff;
    // box-sizing: border-box;
    background-color: transparent;
}

.uni-navbar__content_view {
    // box-sizing: border-box;
}

.uni-navbar-btn-text {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    line-height: 12px;
}

.uni-navbar__header {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    padding: 0 10px;
    flex-direction: row;
    height: $nav-height;
    font-size: 12px;
}

.uni-navbar__header-btns {
    /* #ifndef APP-NVUE */
    overflow: hidden;
    display: flex;
    /* #endif */
    flex-wrap: nowrap;
    flex-direction: row;
    width: 120rpx;
    // padding: 0 6px;
    justify-content: center;
    align-items: center;
    /* #ifdef H5 */
    cursor: pointer;
    /* #endif */
}

.uni-navbar__header-btns-left {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    width: 120rpx;
    justify-content: flex-start;
    align-items: center;
}

.uni-navbar__header-btns-right {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: row;
    // width: 150rpx;
    // padding-right: 30rpx;
    justify-content: flex-end;
    align-items: center;
}

.uni-navbar__header-container {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex: 1;
    padding: 0 10px;
    overflow: hidden;
}

.uni-navbar__header-container-inner {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex: 1;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    overflow: hidden;
    // box-sizing: border-box;
}


.uni-navbar__placeholder-view {
    height: $nav-height;
}

.uni-navbar--fixed {
    position: fixed;
    z-index: 998;
    /* #ifdef H5 */
    left: var(--window-left);
    right: var(--window-right);
    /* #endif */
    /* #ifndef H5 */
    left: 0;
    right: 0;
    /* #endif */

}

.uni-navbar--shadow {
    box-shadow: 0 1px 6px #ccc;
}

.uni-navbar--border {
    border-bottom-width: 1rpx;
    border-bottom-style: solid;
    border-bottom-color: #eee;
}

.uni-ellipsis-1 {
    overflow: hidden;
    /* #ifndef APP-NVUE */
    white-space: nowrap;
    text-overflow: ellipsis;
    /* #endif */
    /* #ifdef APP-NVUE */
    lines: 1;
    text-overflow: ellipsis;
    /* #endif */
}

// 暗主题配置
.uni-dark {
}
</style>
